Did Da Vinci hide clues in his art? - Digging For The Truth | Sky HISTORY TV Channel

Did Da Vinci hide clues in his art? - Digging For The Truth

4:35

What (or perhaps who) is the holy grail? And could a descendant for Jesus and Mary be walking the streets today? (Season 2, Episode 4)

Travis Taylor turns his back on some orange smoke emitting from rocks

Smoke experiment triggers unbelievable results! - Curse of Skinwalker Ranch

William Shatner joins the Ancient Aliens cast

Was Enoch abducted by aliens? William Shatner digs further into the theory - Ancient Aliens

Satellite imagery shows a crashed plane underwater

Why did a secret CIA plane crash here? - What On Earth?

Craig Charles looking interested

Locals find evidence of UK military shooting down UFO - Craig Charles UFO Conspiracies

A small explosion of gunpowder emits from a gun fired by Alice Roberts

The revolutionary weapon that changed UK history - Britain's Most Historic Towns

A human skull on the sandy floor of a cave

The Death Valley Tunnels: a giant government cover-up? - National Park Mysteries